128 Experimental Zoology 
assume that single comb and V-shaped comb (that of the Polish) 
are contrasted characters, and the Y-shaped comb is a combined 
Fic. 11. Male and female black Polish fowls, Figs. 1 and 2; male and female 
black Minorca, Figs. 5 and 6; and hybrids, male and female, Figs. 3 and 4. 
(After Davenport. ) 
form constantly reproducing itself. Further work must decide 
between these alternative views. 
